4. Don't Forget About Your Chest

Stomach or side sleeping, wearing sports and push-up bras, and collagen breakdown from sun damage can all lead to lines on your chest, says Bay Area dermatologist Katie Rodan, MD. Soften them by smoothing on a cream with wrinkle-reducing Vitamin A. We like Neutrogena Rapid WrinkleRepair Night Moisturizer ($40 for a pack of two, amazon.com). To prevent new cleavage crinkles, use a moisturizer with SPF in the morning, and try to sleep on your back.

5. Remember Your Hands

When was the last time you coated them in SPF before heading out into the daily solar assault? Exactly. "Our hands get as much sun as our face, yet we rarely protect them," says Texas dermatologist Sherry Ingraham, MD. Then, to add insult to injury, we slosh them around in a sink full of harsh dishwashing detergent. Use SPF, and put on those rubber gloves (even if they make you feel like a 1950s housewife).

6. Your Neck: So, So Sensitive

The delicate skin here contains fewer oil glands, making it more susceptible to dryness, itching, and redness. "Shop for moisturizers and anti-agers that don't have alcohol-based propylene glycol or fragrance, two leading causes of irritation on the neck," says David Bank, MD, founder of the Center for Dermatology in Mount Kisco, NY.